US6474175B2 - Coriolis mass flowmeter with a ceramic measuring tube - Google Patents

Coriolis mass flowmeter with a ceramic measuring tube Download PDF

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Publication number
US6474175B2
US6474175B2 US09/748,591 US74859100A US6474175B2 US 6474175 B2 US6474175 B2 US 6474175B2 US 74859100 A US74859100 A US 74859100A US 6474175 B2 US6474175 B2 US 6474175B2
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US
United States
Prior art keywords
measuring tube
coriolis
coriolis measuring
mass flowmeter
outer enclosure
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Expired - Fee Related
Application number
US09/748,591
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English (en)
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US20010006007A1 (en
Inventor
Lawrence Davies
Yousif Hussain
Chris N. Rolph
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Krohne AG
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Individual
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Assigned to KROHNE A.G. reassignment KROHNE A.G. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HUSSAIN, YOUSIF, ROLPH, CHRIS N., DAVIES, LAWRENCE
Publication of US20010006007A1 publication Critical patent/US20010006007A1/en
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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
    • G01F15/18—Supports or connecting means for meters
    • G01F15/185—Connecting means, e.g. bypass conduits
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/76—Devices for measuring mass flow of a fluid or a fluent solid material
    • G01F1/78—Direct mass flowmeters
    • G01F1/80—Direct mass flowmeters operating by measuring pressure, force, momentum, or frequency of a fluid flow to which a rotational movement has been imparted
    • G01F1/84—Coriolis or gyroscopic mass flowmeters
    • G01F1/8409—Coriolis or gyroscopic mass flowmeters constructional details
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/76—Devices for measuring mass flow of a fluid or a fluent solid material
    • G01F1/78—Direct mass flowmeters
    • G01F1/80—Direct mass flowmeters operating by measuring pressure, force, momentum, or frequency of a fluid flow to which a rotational movement has been imparted
    • G01F1/84—Coriolis or gyroscopic mass flowmeters
    • G01F1/8409—Coriolis or gyroscopic mass flowmeters constructional details
    • G01F1/8413—Coriolis or gyroscopic mass flowmeters constructional details means for influencing the flowmeter's motional or vibrational behaviour, e.g., conduit support or fixing means, or conduit attachments
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/76—Devices for measuring mass flow of a fluid or a fluent solid material
    • G01F1/78—Direct mass flowmeters
    • G01F1/80—Direct mass flowmeters operating by measuring pressure, force, momentum, or frequency of a fluid flow to which a rotational movement has been imparted
    • G01F1/84—Coriolis or gyroscopic mass flowmeters
    • G01F1/845—Coriolis or gyroscopic mass flowmeters arrangements of measuring means, e.g., of measuring conduits
    • G01F1/8468—Coriolis or gyroscopic mass flowmeters arrangements of measuring means, e.g., of measuring conduits vibrating measuring conduits
    • G01F1/849—Coriolis or gyroscopic mass flowmeters arrangements of measuring means, e.g., of measuring conduits vibrating measuring conduits having straight measuring conduits
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
    • G01F15/006—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus characterised by the use of a particular material, e.g. anti-corrosive material

Definitions

  • This invention relates to a mass flowmeter operating by the Coriolis principle and incorporating a straight Coriolis measuring tube through which flows a fluid or medium, at least one oscillator associated with and exciting the Coriolis measuring tube, and at least one detector associated with the Coriolis measuring tube for capturing the Coriolis force values and/or the Coriolis-force-induced oscillations.
  • the mass flowmeter discussed incorporates, inter alia, at least one oscillator “associated” with the Coriolis measuring tube, and at least one detector “associated” with the Coriolis measuring tube. It is common for the oscillator(s) or, in any event, part of the oscillator(s) and the detector(s) or, in any event, part of the detector(s) to be directly connected to the Coriolis measuring tube. However, since that is not absolutely necessary, the term “associated” is being used instead of “connected”.
  • Mass flowmeters with only one, essentially straight, Coriolis measuring tube have gained in popularity.
  • Mass flowmeters operating by the Coriolis principle and equipped with one straight Coriolis measuring tube offer considerable advantages over mass flowmeters employing either two straight Coriolis measuring tubes or one looped Coriolis measuring tube.
  • their main advantage is that they obviate the need for a flow divider and a flow combiner, required in the case of mass flowmeters with two Coriolis measuring tubes.
  • a straight Coriolis measuring tube is easier to manufacture than a looped Coriolis measuring tube, that in the case of a straight Coriolis measuring tube there is less of a pressure drop than in a looped Coriolis measuring tube, and that a straight Coriolis measuring tube can be cleaned more thoroughly than a looped Coriolis measuring tube.
  • the mass flowmeter according to this invention which solves the above-mentioned problem is characterized in that the Coriolis measuring tube consist of a ceramic material.
  • a Coriolis measuring tube made from a ceramic material offers the advantage of permitting operation in a very wide temperature range including very high temperatures, displaying only moderate thermal expansion throughout the said wide operational temperature range.
  • ceramic materials are not affected, or temperatures, displaying only moderate thermal expansion throughout the said wide operational temperature range.
  • ceramic materials are not affected, or barely so, by corrosive substances such as chloric gases or liquids, which opens up a broad spectrum of possible applications for the Coriolis flowmeter according to this invention.
  • the Coriolis measuring tube consists of zirconium oxide or aluminum oxide and, according to a particularly preferred embodiment of this invention which allows the use of the Coriolis mass flowmeter for virtually all chemical compounds save for hydrofluoric acid (HF), of zirconium-stabilized aluminum oxide containing in excess of 5% zirconium.
  • the Coriolis measuring tube for the mass flowmeter according to this invention preferably uses nitride ceramics.
  • the mass flowmeter of this invention operating by the Coriolis principle, can be structured along essentially any conventional mass flowmeter design employing a single straight Coriolis measuring tube.
  • a design is used whereby the mass flowmeter is provided with an outer enclosure which features a flange permitting installation in a pipe system. It is particularly desirable in this case to decouple the Coriolis measuring tube from any longitudinal forces in the pipe system in which it is installed.
  • Such decoupling is preferably obtainable by firmly attaching the two ends of the Coriolis measuring tube to the outer enclosure while dimensioning and positioning it in such fashion that the Coriolis measuring tube is slightly set back from the lateral surfaces of the Coriolis mass flowmeter so that, when installed in the pipe system, it does not make direct contact with the latter.
  • At least one end of the Coriolis measuring tube is equipped with a firmly attached ring element which preferably consists of metal or a plastic material and by way of which the Coriolis measuring tube is connected to the outer enclosure.
  • a ring of this type can serve several purposes: For one, the ring facilitates the attachment of the outer enclosure to the ceramic Coriolis measuring tube. For another, the ring can serve as a locating guide and support for a gasket.
  • the ring element that is firmly attached to one end of the Coriolis measuring tube can help neutralize stress patterns in the ceramic Coriolis measuring tube which are caused by thermal expansion of the ceramic Coriolis measuring tube.
  • the strength and substantial rigidity of the outer enclosure would not permit any changes in length of the ceramic Coriolis measuring tube without at least some stress arising in the Coriolis measuring tube.
  • a ring element firmly connected to the end of the Coriolis measuring tube by virtue of a certain degree of elasticity, allows for at least a small, thermally induced longitudinal movement of the Coriolis measuring tube, eliminating or at least minimizing thermal-expansion-related stress patterns in the latter.
  • the ring element that is firmly attached to one end of the Coriolis measuring tube will permit only longitudinal shifts of the Coriolis measuring tube which do not affect the symmetry and corresponding measuring accuracy of the Coriolis mass flowmeter.
  • the ring element can be attached to the end of the ceramic Coriolis measuring tube in a variety of ways. Preferably, however, the ring is crimped or shrink-mounted onto the ceramic Coriolis measuring tube. If the ring is of metal, it may also be welded onto a metallized surface section of the ceramic Coriolis measuring tube.
  • a further, preferred invention embodiment provides for the ceramic Coriolis measuring tube according to this invention to be impervious to gas and liquids by means of a seal between the end faces of the Coriolis measuring tube and the corresponding end faces of the flanges of the pipe system in which the Coriolis mass flowmeter is installed. Most preferably, this seal separates the Coriolis measuring tube from both the outer enclosure and the pipe system in which the Coriolis mass flowmeter is to be used.
  • a seal of this type when provided in the Coriolis mass flowmeter serves the additional purpose of absorbing and compensating for any thermally induced longitudinal expansion of the ceramic Coriolis measuring tube or of the pipe system and any possibly resulting compressive force exerted on the ceramic Coriolis measuring tube, thus essentially preventing such thermal expansion from engendering stress patterns in the Coriolis measuring tube.
  • the seal consists of rubber or a plastic material, preferably Viton® or Kalrez®.
  • the outer enclosure can be attached to the ends of the ceramic Coriolis measuring tube in simple, dependable and damage-free fashion by making the wall of the Coriolis measuring tube at least at one end thicker than in its mid-section.
  • the wall thickness in the mid-section of the ceramic Coriolis measuring tube is preferably less than 1 mm and is preferably about 0.7 mm.
  • an internal cylinder is attached to the ends of the Coriolis measuring tube in the mass flowmeter according to this invention.
  • a preferred embodiment of the mass flowmeter according to this invention provides for the Coriolis measuring tube to be installable in the pipe system in such fashion that the Coriolis measuring tube is decoupled from the pipe system in terms of any bending force emanating from the pipe system and potentially affecting the Coriolis measuring tube.
  • This can be accomplished, for instance, by providing at the ends of the Coriolis measuring tube an elastically deformable buffer ring between the Coriolis measuring tube and the outer enclosure which is elastically deformable in a direction which is essentially perpendicular to the longitudinal axis of the Coriolis measuring tube.
  • any axial bending force of the pipe system that would be transferred to the mass flowmeter at an angle essentially perpendicular to the axis of the Coriolis measuring tube, while deforming the buffer ring, will for all practical purposes be absorbed without deforming the Coriolis measuring tube.
  • FIG. 1 is a schematic cross-sectional view of part of a Coriolis mass flowmeter according to a first preferred embodiment of this invention, installed in a pipe system;
  • FIG. 2 is a schematic cross-sectional view of a Coriolis mass flowmeter according to a second preferred embodiment of this invention.
  • the schematic cross-sectional illustration in FIG. 1 shows a Coriolis mass flowmeter according to a first preferred embodiment of this invention in its installed position, i.e. the junction between the Coriolis mass flowmeter and the pipe system in which it is used.
  • the Coriolis measuring tube 1 according to the first preferred embodiment of this invention consists of zirconium-stabilized aluminum oxide containing in excess of 5% zirconium. This material permits the use of the Coriolis mass flowmeter for practically any chemical substance with the exception of hydrofluoric acid.
  • the ceramic Coriolis measuring tube 1 is housed in a metallic outer enclosure 2 which also defines the outer dimensions of the Coriolis mass flowmeter.
  • the outer enclosure 2 While in its mid-section the outer enclosure 2 has a diameter substantially larger than that of the Coriolis measuring tube 1 , the two ends of the outer enclosure 2 , of which only the left-hand end is shown in FIG. 1, are of a smaller diameter so as to facilitate the attachment of the enclosure 2 to the Coriolis measuring tube 1 and to enclosure 2 , of which only the left-hand end is shown in FIG. 1, are of a smaller diameter so as to facilitate the attachment of the enclosure 2 to the Coriolis measuring tube 1 and to allow the attachment, positionally fixed in the longitudinal direction, of a flange 3 to the enclosure 2 .
  • the flange 3 serves for mounting the Coriolis mass flowmeter on the pipe system 4 in which the Coriolis mass flowmeter is to be used.
  • a metal ring 5 is located between the smaller-diameter end of the outer enclosure 2 and the Coriolis measuring tube 1 and, according to the first preferred embodiment of this invention as shown in FIG. 1, is crimp-mounted on the Coriolis measuring tube 1 .
  • a solid connection between the ring 5 and the enclosure 2 can be obtained by welding.
  • the pipe system 4 For mounting the Coriolis mass flowmeter to the pipe system 4 , the pipe system 4 is provided with a flange 6 which attaches to the flange 3 of the Coriolis mass flowmeter.
  • the length of the Coriolis measuring tube 1 and its position within the outer enclosure 2 are such that the Coriolis measuring tube 1 will not protrude beyond the lateral ends or limits of the enclosure 2 but will in fact be slightly set back from these ends. According to the first preferred embodiment of the invention, this permits the positioning of a plastic seal 7 between the Coriolis measuring tube 1 and its crimp-mounted ring 5 and, respectively, the flange 6 of the pipe system 4 .
  • the seal 7 essentially performs these functions: it seals the Coriolis measuring tube 1 against both the outer enclosure 2 and the pipe system 4 ; it also serves as a buffer for the Coriolis measuring tube 1 against the longitudinal, axial forces which could potentially be transferred, for instance, from the pipe system 4 into the Coriolis mass flowmeter and thus to the Coriolis measuring tube 1 .
  • the ring 5 being of metal, has a certain measure of elasticity and at least to some degree provides an elastic connection between the outer enclosure 2 and the Coriolis measuring tube 1 , counteracting the generation of such stress patterns in the Coriolis measuring tube 1 possibly caused by thermally induced longitudinal expansion.
  • the flange 3 connects to the outer enclosure 2 via a threaded section.
  • a weldment can be provided between the enclosure 2 and the flange 3 .
  • a particularly secure positioning of the seal 7 is obtainable by providing on the latter an annular ledge along its radial perimeter which ledge protrudes between the Coriolis measuring tube 1 and the outer enclosure 2 all the way to the ring 5 that is crimp-mounted on the Coriolis measuring tube 1 .
  • FIG. 2 is a schematic cross-sectional view of a Coriolis mass flowmeter according to a second preferred embodiment of this invention.
  • the wall is thicker at the two ends of the ceramic Coriolis measuring tube 1 than in the area of its mid-section.
  • the ends at which the Coriolis measuring tube 1 is connected to the outer enclosure 2 offer the necessary wall thickness and ensure correspondingly high stability of the Coriolis measuring tube 1 while its midsection, which is subjected to an excitation oscillation and also registers the Coriolis oscillations of the flowing medium, offers good oscillatory properties.
  • an internal cylinder 8 is attached to the said end section with the aid of annular wedges 9 .
  • the above statement relative to the stability and strength of the Coriolis measuring tube 1 also applies in conjunction with the mounting of the internal cylinder 8 using annular wedges 9 .
  • an oscillator exciting the Coriolis measuring tube 1 and at least one detector capturing the Coriolis forces and/or the oscillations derived from the Coriolis forces.
  • the ceramic Coriolis measuring tube 1 in the second preferred embodiment of the invention shown in FIG. 2 is again so dimensioned and positioned that on both sides of the Coriolis mass flowmeter, it is set back from the ends of the Coriolis mass flowmeter, defined by the outer enclosure 2 .
  • This allows for the installation of a seal 7 which, as explained above, serves to stop and buffer the longitudinal forces that would otherwise bear on the end faces of the Coriolis measuring tube 1 .
  • the seal 7 is an O-ring gasket consisting of Kalrez® and simply inserted at the end section of the Coriolis mass flowmeter between the Coriolis measuring tube 1 and, not shown in FIG. 2, the flange of the pipe system in which the Coriolis mass flowmeter is installed.
  • the Coriolis measuring tube in the mass flowmeter preferably consists of zirconium-stabilized aluminum oxide containing in excess of 5% zirconium.
  • the following parameters apply as individual alternatives or cumulatively in any combination:
  • the thermal expansion coefficient should be between that of steel and that of titanium.
  • the density should be higher than that of titanium but lower than that of steel.
  • the bending strength should be somewhat less than that of titanium but greater than that of steel.
  • the compression resistance should be very high relative to that of titanium and steel.

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  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Measuring Volume Flow (AREA)
US09/748,591 1999-12-27 2000-12-22 Coriolis mass flowmeter with a ceramic measuring tube Expired - Fee Related US6474175B2 (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
GB19962858 1999-12-27
DE19962858 1999-12-27
GB10003784 2000-01-28
DE19962858.0 2000-01-28
DE10003784A DE10003784B4 (de) 1999-12-27 2000-01-28 Coriolis-Massendurchflußmeßgerät

Publications (2)

Publication Number Publication Date
US20010006007A1 US20010006007A1 (en) 2001-07-05
US6474175B2 true US6474175B2 (en) 2002-11-05

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US09/748,591 Expired - Fee Related US6474175B2 (en) 1999-12-27 2000-12-22 Coriolis mass flowmeter with a ceramic measuring tube

Country Status (6)

Country Link
US (1) US6474175B2 (fr)
EP (1) EP1113248B1 (fr)
JP (1) JP4681115B2 (fr)
AT (1) ATE518118T1 (fr)
DE (1) DE10003784B4 (fr)
DK (1) DK1113248T3 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060010991A1 (en) * 2004-07-15 2006-01-19 Pdc Facilities, Inc. Liner for a flow meter
US20060110560A1 (en) * 2004-11-25 2006-05-25 Hussain Yousif A Coriolis mass flow meter and method for manufacturing a measuring tube for a coriolis mass flow meter
US20060201260A1 (en) * 2005-02-25 2006-09-14 Endress + Hauser Flowtec Ag Vibration type measurement transducer
US20070119121A1 (en) * 2005-11-28 2007-05-31 Pdc Facilities, Inc. Filling machine
US20080035227A1 (en) * 2005-07-14 2008-02-14 Pdc Facilities, Inc. Liner for a flow meter
US20090126509A1 (en) * 2005-06-01 2009-05-21 Siemens Aktiengesellschaft Mass Flow Meter

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7127815B2 (en) * 2001-11-26 2006-10-31 Emerson Electric Co. Method of manufacturing a Coriolis flowmeter
US6776053B2 (en) * 2001-11-26 2004-08-17 Emerson Electric, Inc. Flowmeter for the precision measurement of an ultra-pure material flow
DE10159809B4 (de) * 2001-12-05 2020-07-16 Endress + Hauser Flowtec Ag Messaufnehmer vom Vibrationstyp
DE10233307B4 (de) * 2002-07-22 2005-06-16 Krohne Ag Massendurchflußmeßgerät
US7299699B2 (en) 2004-10-05 2007-11-27 Endress + Hauser Flowtec Ag Composite system, method for its manufacture, and measurement pickup using such a composite system
DE102004048765A1 (de) * 2004-10-05 2006-04-06 Endress + Hauser Flowtec Ag Verbund-System, Verfahren zu dessen Herstellung sowie Messaufnehmer mit einem solchen Verbund-System
RU2379633C2 (ru) * 2005-02-25 2010-01-20 Эндресс+Хаузер Флоутек Аг Измерительный преобразователь вибрационного типа
DE102005013649A1 (de) * 2005-03-24 2006-09-28 Endress + Hauser Flowtec Ag Meßaufnehmer vom Vibrationstyp
US20150153210A1 (en) * 2013-12-04 2015-06-04 Gilbarco Inc. Fuel dispenser coriolis flow meter
DE102019122210B3 (de) * 2019-08-19 2021-01-28 Endress+Hauser Flowtec Ag Messrohr eines Coriolis-Messaufnehmers mit einer LTCC-Keramik, Coriolis-Messaufnehmer mit einem solchen Messrohr und Coriolis-Messgerät mit einem solchen Coriolis-Messaufnehmer.
EP3992590A1 (fr) 2020-10-27 2022-05-04 Heinrichs Messtechnik GmbH Débitmètre de coriolis et son procédé de fabrication
DE102021104631A1 (de) * 2021-02-26 2022-09-01 Endress+Hauser Flowtec Ag Meßgerät
DE102021130048A1 (de) * 2021-11-17 2023-05-17 Endress+Hauser Flowtec Ag Messrohrsystem, Messrohr, sowie Herstellungsverfahren für ein Messrohrsystem

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5027662A (en) * 1987-07-15 1991-07-02 Micro Motion, Inc. Accuracy mass flow meter with asymmetry and viscous damping compensation
US5157975A (en) * 1988-05-24 1992-10-27 Micro Motion, Inc. Coriolis mass flow meter employing non-metallic flow conduit structure
US5747704A (en) * 1994-10-07 1998-05-05 Krohne Messtechnik Gmbh & Co., Kg Meter for flowing media

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8420882D0 (en) * 1984-08-04 1984-09-19 British Petroleum Co Plc Flow meter
US5373745A (en) * 1991-02-05 1994-12-20 Direct Measurement Corporation Single path radial mode Coriolis mass flow rate meter
DE4119396C1 (en) * 1991-06-12 1992-08-27 Georg F. 8240 Berchtesgaden De Wagner Measuring tube for Coriolis mass flow meter - comprises carbon@ produced by pyrolysis of non-meltable plastics
CN1058566C (zh) * 1993-07-21 2000-11-15 安德雷斯和霍瑟·弗罗泰克有限公司 科里奥利式质量流量传感器

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5027662A (en) * 1987-07-15 1991-07-02 Micro Motion, Inc. Accuracy mass flow meter with asymmetry and viscous damping compensation
US5157975A (en) * 1988-05-24 1992-10-27 Micro Motion, Inc. Coriolis mass flow meter employing non-metallic flow conduit structure
US5747704A (en) * 1994-10-07 1998-05-05 Krohne Messtechnik Gmbh & Co., Kg Meter for flowing media

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060010991A1 (en) * 2004-07-15 2006-01-19 Pdc Facilities, Inc. Liner for a flow meter
US7497130B2 (en) 2004-07-15 2009-03-03 Pdc Facilities, Inc. Liner for a flow meter
US20060110560A1 (en) * 2004-11-25 2006-05-25 Hussain Yousif A Coriolis mass flow meter and method for manufacturing a measuring tube for a coriolis mass flow meter
US7698957B2 (en) 2005-02-25 2010-04-20 Endress + Hauser Flowtec Ag Vibration type measurement transducer
US20060201260A1 (en) * 2005-02-25 2006-09-14 Endress + Hauser Flowtec Ag Vibration type measurement transducer
US7451662B2 (en) 2005-02-25 2008-11-18 Endress + Hauser Flowtec Ag Vibration type measurement transducer
US20090139349A1 (en) * 2005-02-25 2009-06-04 Endress + Hauser Flowtec Ag Vibration type measurement transducer
US20090126509A1 (en) * 2005-06-01 2009-05-21 Siemens Aktiengesellschaft Mass Flow Meter
US7690269B2 (en) * 2005-06-01 2010-04-06 Siemens Aktiengesellschaft Coriolis flow meter having bearings for mounting the measuring tube in the region of the oscillation nodes
US20080035227A1 (en) * 2005-07-14 2008-02-14 Pdc Facilities, Inc. Liner for a flow meter
US7819139B2 (en) 2005-07-14 2010-10-26 Pdc Facilities, Inc. Liner for a flow meter
US20070119121A1 (en) * 2005-11-28 2007-05-31 Pdc Facilities, Inc. Filling machine
US7484345B2 (en) 2005-11-28 2009-02-03 Pdc Facilities, Inc. Filling machine

Also Published As

Publication number Publication date
DK1113248T3 (da) 2011-10-24
US20010006007A1 (en) 2001-07-05
EP1113248B1 (fr) 2011-07-27
DE10003784B4 (de) 2004-12-09
EP1113248A3 (fr) 2004-04-21
DE10003784A1 (de) 2001-07-05
JP2001183205A (ja) 2001-07-06
EP1113248A2 (fr) 2001-07-04
ATE518118T1 (de) 2011-08-15
JP4681115B2 (ja) 2011-05-11

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